Drill-chuck.



PATBNTBD PEB. 27, 190e.

H. L. om. DRILL-GHUGK. APPLICATION FILED SEPT. 3, 1904.

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HARRY L. OOIT, OF NEW LONDON, CONNECTICUT.

Appumi'on nea september s, 1901;. serai No. 223,180.

.'o all whom, t may concern:

Be it known that I', HARRY L. Corr, a citizen of the United States, residing at New London, Connecticut, have invented certain new and useful Im rovements in Drill- Chucks, of which the ollowing is a specification.

My invention relates to' drill-chucks; and its object is to provide a chuck that will beA of [o simple construction in which the parts will not be-easily disarranged and in which the friction will be reduced to a minimum; also, to provide a chuck from which the jaws may be removed and replaced without taking the chuck apart.

l With these objects in view my invention consists of the construction hereinafter described, and more fully set forth in the claims. In the accompanying drawings, Figure 1 is lzo a longitudinal section of the chuck. Figs. 2 and 3 are detail views of one of the jaws. Figs. 4' and 5 are detail views of the traveling collar. Referring to the drawings, D is the body or z 5 core of the chuck and is cylindrical in form, having at its rear end a reduced portion d and at its front end the enlarged portion D', the forward end of this enlarged portion being tapered at D. The core D is provided 3o at each end with a recess b b to receive the tool and the tool-handle or the mandrel, respectively. The guideways g for the jaws G extend from the recess b to the shoulder formed on the core D by the enlarged por- 3 5 tion D. For a portion of its length the enlarged part D is turned down to a cylindrical form, as at d/, leaving a shoulder al on the inner edge thereof.

Surrounding the body I) is a sleeve A, hav- 4o ing its inner surface screw-threaded for a portion of its length and its outer surface knurled. The forward end of the sleeve is beveled to meet the taper D'on the enlarged end of the body D and is provided with an inwardlyextending portion a., forming a shoulder d. The end a of the sleeve lits on the cylindrical part d of the enlarged portion of the body. -fIhe shoulders d of the part D and a of the sleeve A face one another and form the ball- 5o race for the ballbearing H.- Within the sleeve A and surrounding the cylindrical portion of the body D is a collar C, having its outer face threaded to mesh with the threads on the'interior of the sleeve A and its inner face adapted to slide freely on the core D. In the forward side of the collar C are a series Specification of Letters Patent.

Patented Feb. 27,1906.

.of recesses c, which, are preferably in the form of cylindrical openings extending transversely through the collar near its edge and having an opening c through the side ofthe collar of I 6o slightly less diameter than the recess.-. The jaws G are preferably cylindrical in shape, having one end beveled, as at G, to form the gripping-face of the jaw and having thejopposite end rounded toform a ball G, which when placed within the recess C forms a balland-socket oint. To permit of the removal of the aw without taking-the chuck apart,

Ithe ball G is slightly liattened on its inner and outer faces, thus reducing the diameter 7o of the ball sulliciently to allow it to Ppass through the opening cv of the recessc. When the jaw is in position for use, the head G is turned, so that its greatest diameter is across the opening c', allowing the jaw perfect free- 75 dom of movement, but holding it securely in the socket. To removethe jaw, it is turned a quarter of a revolution to bring the narrow portion of the head in alinement with the opening, allowing the jaw t0 be withdrawn 8o through the gudeway g, The outer face of the jaw yis flattenedfor a part of its length and the screw F provided to prevent it from turning, and at the same timeallow it to slide freelyin the guideway. i 8 5 A washer or collar B is provided to close the end of chuck and to form the rear bearing for the sleeve A. The outer face of the washer is screwthreaded to fit in the end'of the sleeve A and is secured in place by the screw 9o E passing through the sleeve. The opening. in the washer is of a 'size to permit it td fit over the reduced-part d of the body D and to turn freely' thereon.

In operation the chuck is heldby the toolhandle or mandrel, inserted at b', and the sleeve A revolved. As the sleeve revolves the threads von its inner face engage the threads on the'collar C and move the collar forward or backward, according to the direcroo 'sleeve sui'i'oiiiiding said coiie,

collar having cylindrical openings extending l ends of said jaws, sai

transversely therethroughl'and openings extending through the face of said collar into 'said cylindrical openings ofless diameter than said cylindrical openings, jaws circular in cross-sectionxextending through said openings in the enla-r ed portion of said core and su stantially dis -shaned heads on the inner d heads being adapted to enter the openings iii the face oi said collar when turned to a position parallel therewith, substantially as described. v

2. A drill-chuck comrising a core, an enlarged portion at one en 4oisaid core, oblique `o enings throu h said enlarged portion, a a eeve surroun mg said core, a collar surzo rounding said core, within said sleeve and said cylindridal openings eia'eee collar having cylindricalv openings extending transversely therethrough and' openings extending through the face ofsaidjcollar into of less' diameter than said cylindrical openings, in cross-section extendin in s i'n the enlazr ed portion of, said core and' suistantiall dis -shap'ed heads on the inner ends, ,of sai jaws, sai heads-being adapted jaws circular to enter the openings in the face-of said collar when turnedto a position parallel therewith and means-for preventing said jaws from heing turned, substantiall as described.

ntestimony whereo I affix my slgniatiirel 1n presence of two witnesses.

l HARRY L. corr. Witnesses: y M.' WILsoN DART,

HORACE' R. Gamma, Jr.

adapted to nieve lengthwise thereof, saidl'i" g' through sai'd'open- 

